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Method for determination of carbon black content in process gas

A determination method and technology for carbon black content, applied in the field of coal chemical industry, can solve problems such as simple and accurate determination of carbon black content, and achieve the effects of small relative error, avoiding influence, and accurate carbon black content

Active Publication Date: 2017-06-06
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to provide a method for measuring carbon black content, so as to improve the deficiency of relatively simple and accurate measurement of carbon black content in process gas in the prior art

Method used

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  • Method for determination of carbon black content in process gas
  • Method for determination of carbon black content in process gas
  • Method for determination of carbon black content in process gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 1. Preparation work:

[0078] (1) Take two absorption bottles with a volume of 250ml, put 100ml of high-purity water into the absorption bottle 1 and the absorption bottle 2 respectively, after weighing, it will be C1, insert the air intake pipe 1.5cm below the water surface, and put the absorption bottle and the air intake pipe The pipe is carried to the process gas site for sampling.

[0079] (2) Soak the acid-washed asbestos and filter paper with ultra-pure water in advance, and then put the Buchner funnel containing the acid-washed asbestos and filter paper into the oven, dry at 105°C for 3 hours, cool in the desiccator, and use an analytical balance to quickly Accurately weigh the mass a of the dry Buchner funnel (together with acid-washed asbestos and filter paper) before absorption.

[0080] (3) Fill 100 ml of NaOH solution with a mass concentration of 0.5% into the absorption bottle 3 with a volume of 250 nl, and carry it to the sampling site for standby.

[0...

Embodiment 2

[0093] 1. Preparation work:

[0094] (1) Take 4 absorbing bottles whose volume is 500ml, fill 200ml tap water in absorbing bottle 1, absorbing bottle 2, absorbing bottle 3 and absorbing bottle 4, and record the total mass of four absorbing bottles as C1 after weighing, Insert the intake pipe 2cm below the water surface, and carry the absorption bottle 1, absorption bottle 2, absorption bottle 3, absorption bottle 4 and the intake pipe to the process gas site for sampling.

[0095] (2) Soak the acid-washed asbestos and filter paper with tap water in advance, and then put the glass sand core funnel containing the acid-washed asbestos and filter paper into the oven, dry at 115°C for 3 hours, cool in the desiccator, and quickly and accurately use an analytical balance Weigh the mass a of the dry Buchner funnel (together with acid-washed asbestos and filter paper) before absorption.

[0096] (3) Fill 150 ml of NaOH solution with a mass concentration of 0.3% into the absorption bot...

Embodiment 3

[0109] 1. Preparation work:

[0110] (1) Fill 100ml of high-purity water into absorption bottle 1, absorption bottle 2 and absorption bottle 3 with a volume of 1000ml, record it as C1 after weighing, insert the air intake pipe 1.5cm below the water surface, and place absorption bottle 1, absorption bottle 2 , the absorption bottle 3 and the intake pipe are carried to the process gas site for sampling.

[0111] (2) Soak the acid-washed asbestos and filter paper with tap water in advance, and then put the glass sand core funnel containing the acid-washed asbestos and filter paper into the oven, dry at 110°C for 3 hours, cool in the desiccator, and quickly and accurately use an analytical balance Weigh the mass a of the dry Buchner funnel (together with acid-washed asbestos and filter paper) before absorption.

[0112] (3) Fill 200ml of NaOH solution with a mass concentration of 0.8% into the absorption bottle 4 with a volume of 1000ml, and carry it to the sampling site for stan...

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Abstract

The invention discloses a method for measuring the content of carbon black in technical gas. The measurement method comprises the steps of preparing technical gas to be measured from technical gas containing carbon black; feeding the technical gas to be measured into carbon black adsorption liquid to obtain carbon black enrichment liquid and wet technical gas which does not contain carbon black; obtaining the carbon black in the carbon black enrichment liquid, and weighing dry carbon black; and calculating a ratio of the weight of the dry carbon black to the volume of the technical gas to be measured to obtain the content of the carbon black in the technical gas. The carbon black is gathered into the carbon black adsorption liquid to realize separation of the carbon black in the technical gas to be measured from the technical gas, and the content of the carbon black in the technical gas can be measured by a weight method; a relative error introduced by the measurement method is relatively small, and the measured content of the carbon black in the technical gas is relatively accurate, and therefore, the content of the carbon black can be monitored in real time, and the influence caused by subsequent technical production is avoided.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a method for measuring carbon black content in process gas. Background technique [0002] Carbon black refers to the black powdery substance formed by the incomplete combustion or pyrolysis of hydrocarbons in the gas phase under strictly controlled process conditions. Its composition is mainly elemental carbon, and contains a small amount of oxygen, hydrogen and sulfur. The carbon black particles are approximately spherical, and the particle size is between 10 and 500 μm. Many particles are often fused or coalesced into three-dimensional bonded dendritic or fibrous aggregates. [0003] During the combustion of coal-water slurry in many factory gasifiers, a certain amount of carbon black will be produced due to insufficient combustion. Although a part will be removed after washing and filtering, in the actual production process, the content of carbon black produced needs t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/02
Inventor 赵灵春包福娥刘尚清
Owner CHINA SHENHUA ENERGY CO LTD
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